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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: AbstractQueryContainer.html 795 2013-12-11 18:48:15Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.vaadin;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.vaadin.data.Container;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.vaadin.data.Item;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.vaadin.data.Property;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import com.vaadin.data.util.AbstractContainer;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.AbstractList;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.Collection;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.Collections;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.util.HashMap;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.List;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.Set;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>/**<a name="line.22"></a>
<span class="sourceLineNo">023</span> * Support superclass for read-only {@link Container} implementations where each {@link Item} in the container<a name="line.23"></a>
<span class="sourceLineNo">024</span> * is backed by a Java object, and the Java objects are generated via {@linkplain #query a query} that returns<a name="line.24"></a>
<span class="sourceLineNo">025</span> * a {@link QueryList} containing only some portion of the total list of backing objects at any one time.<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * &lt;p&gt;<a name="line.27"></a>
<span class="sourceLineNo">028</span> * This {@link Container}'s {@link Property}s are defined via {@link PropertyDef}s, and a {@link PropertyExtractor}<a name="line.28"></a>
<span class="sourceLineNo">029</span> * is used to actually extract the property values from each underlying object (alternately, subclasses can override<a name="line.29"></a>
<span class="sourceLineNo">030</span> * {@link #getPropertyValue getPropertyValue()}). However, the easist way to configure the container {@link Property}s<a name="line.30"></a>
<span class="sourceLineNo">031</span> * is to pass a {@link ProvidesProperty &amp;#64;ProvidesProperty}-annotated Java class to the {@link #AbstractQueryContainer(Class)}<a name="line.31"></a>
<span class="sourceLineNo">032</span> * constructor.<a name="line.32"></a>
<span class="sourceLineNo">033</span> * &lt;/p&gt;<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * &lt;p&gt;<a name="line.35"></a>
<span class="sourceLineNo">036</span> * This {@link Container}'s item ID's are simply the indexes of the corresponding objects in the overall list. The {@link QueryList}<a name="line.36"></a>
<span class="sourceLineNo">037</span> * interface is designed for scalability; at minimum, it is required to provide only the size of the total list<a name="line.37"></a>
<span class="sourceLineNo">038</span> * (which may only be an estimate) and one backing object at a specified index.<a name="line.38"></a>
<span class="sourceLineNo">039</span> *<a name="line.39"></a>
<span class="sourceLineNo">040</span> * &lt;p&gt;<a name="line.40"></a>
<span class="sourceLineNo">041</span> * This class will invoke {@link #query} as needed to (re)generate the {@link QueryList}; the {@link QueryList} is then cached.<a name="line.41"></a>
<span class="sourceLineNo">042</span> * However, if any invocation of {@link QueryList#get} throws an {@link InvalidQueryListException}, then the cached<a name="line.42"></a>
<span class="sourceLineNo">043</span> * list is discarded and {@link #query} is invoked again to regenerate it. In this way, the {@link QueryList} is<a name="line.43"></a>
<span class="sourceLineNo">044</span> * allowed to decide, on demand, when it is invalid or incapable of providing a specific list member. For example,<a name="line.44"></a>
<span class="sourceLineNo">045</span> * when using JPA, a list may be considered invalid if the current EntityManager session has changed.<a name="line.45"></a>
<span class="sourceLineNo">046</span> * &lt;/p&gt;<a name="line.46"></a>
<span class="sourceLineNo">047</span> *<a name="line.47"></a>
<span class="sourceLineNo">048</span> * &lt;p&gt;<a name="line.48"></a>
<span class="sourceLineNo">049</span> * Note that the {@link QueryList} being invalid is an orthogonal concept from the contents of the list having changed.<a name="line.49"></a>
<span class="sourceLineNo">050</span> * Invalid means "this list can no longer be used" while changed means "this list contains out-of-date information".<a name="line.50"></a>
<span class="sourceLineNo">051</span> * Normally, the latter implies the former (but not vice-versa). The list becoming invalid does not in itself not cause<a name="line.51"></a>
<span class="sourceLineNo">052</span> * any notifications to be sent, so no new query will be performed until e.g. the user interface explicitly requests<a name="line.52"></a>
<span class="sourceLineNo">053</span> * more information.<a name="line.53"></a>
<span class="sourceLineNo">054</span> * &lt;/p&gt;<a name="line.54"></a>
<span class="sourceLineNo">055</span> *<a name="line.55"></a>
<span class="sourceLineNo">056</span> * &lt;p&gt;<a name="line.56"></a>
<span class="sourceLineNo">057</span> * Therefore, if the list size or content changes, first invoke {@link #invalidate} to discard the cached {@link QueryList},<a name="line.57"></a>
<span class="sourceLineNo">058</span> * and then {@link #fireItemSetChange} to notify listeners; for convenience, {@link #reload} will perform these two steps for<a name="line.58"></a>
<span class="sourceLineNo">059</span> * you. The new size and content will be provided by the {@link QueryList} returned by the next invocation of {@link #query}.<a name="line.59"></a>
<span class="sourceLineNo">060</span> * &lt;/p&gt;<a name="line.60"></a>
<span class="sourceLineNo">061</span> *<a name="line.61"></a>
<span class="sourceLineNo">062</span> * &lt;p&gt;<a name="line.62"></a>
<span class="sourceLineNo">063</span> * The subclass may forcibly invalidate the current {@link QueryList} via {@link #invalidate}; this merely discards it<a name="line.63"></a>
<span class="sourceLineNo">064</span> * and will force a new invocation of {@link #query} on the next container access. In many situations, however,<a name="line.64"></a>
<span class="sourceLineNo">065</span> * the use of {@link #invalidate} is never required.<a name="line.65"></a>
<span class="sourceLineNo">066</span> * &lt;/p&gt;<a name="line.66"></a>
<span class="sourceLineNo">067</span> *<a name="line.67"></a>
<span class="sourceLineNo">068</span> * &lt;p&gt;<a name="line.68"></a>
<span class="sourceLineNo">069</span> * For scalability reasons the {@link QueryList} may actually only contain a portion of the list, throwing<a name="line.69"></a>
<span class="sourceLineNo">070</span> * {@link InvalidQueryListException}s when other list members are accessed.  An "index hint" parameter provided to<a name="line.70"></a>
<span class="sourceLineNo">071</span> * {@link #query} indicates which member of the container is of current interest. The returned {@link QueryList}<a name="line.71"></a>
<span class="sourceLineNo">072</span> * is required to provide exception-free access only to the indicated member, so in the extreme case only a single<a name="line.72"></a>
<span class="sourceLineNo">073</span> * list member could be kept. In practice, normally range of members near to the index hint would be kept;<a name="line.73"></a>
<span class="sourceLineNo">074</span> * see for example {@link WindowQueryList}.<a name="line.74"></a>
<span class="sourceLineNo">075</span> * &lt;/p&gt;<a name="line.75"></a>
<span class="sourceLineNo">076</span> *<a name="line.76"></a>
<span class="sourceLineNo">077</span> * @param &lt;T&gt; the type of the Java objects that back each {@link Item} in the container<a name="line.77"></a>
<span class="sourceLineNo">078</span> * @see QueryList<a name="line.78"></a>
<span class="sourceLineNo">079</span> * @see SimpleQueryList<a name="line.79"></a>
<span class="sourceLineNo">080</span> * @see WindowQueryList<a name="line.80"></a>
<span class="sourceLineNo">081</span> * @see AbstractUnsizedContainer<a name="line.81"></a>
<span class="sourceLineNo">082</span> */<a name="line.82"></a>
<span class="sourceLineNo">083</span>@SuppressWarnings("serial")<a name="line.83"></a>
<span class="sourceLineNo">084</span>public abstract class AbstractQueryContainer&lt;T&gt; extends AbstractContainer implements PropertyExtractor&lt;T&gt;,<a name="line.84"></a>
<span class="sourceLineNo">085</span>  Container.Ordered, Container.Indexed, Container.PropertySetChangeNotifier, Container.ItemSetChangeNotifier {<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>    private QueryList&lt;? extends T&gt; queryList;<a name="line.87"></a>
<span class="sourceLineNo">088</span>    private long totalSize = -1;<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span>    private final HashMap&lt;String, PropertyDef&lt;?&gt;&gt; propertyMap = new HashMap&lt;String, PropertyDef&lt;?&gt;&gt;();<a name="line.90"></a>
<span class="sourceLineNo">091</span>    private PropertyExtractor&lt;? super T&gt; propertyExtractor;<a name="line.91"></a>
<span class="sourceLineNo">092</span><a name="line.92"></a>
<span class="sourceLineNo">093</span>// Constructors<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>    /**<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * Constructor.<a name="line.96"></a>
<span class="sourceLineNo">097</span>     *<a name="line.97"></a>
<span class="sourceLineNo">098</span>     * &lt;p&gt;<a name="line.98"></a>
<span class="sourceLineNo">099</span>     * After using this constructor, subsequent invocations of {@link #setPropertyExtractor setPropertyExtractor()}<a name="line.99"></a>
<span class="sourceLineNo">100</span>     * and {@link #setProperties setProperties()} are required to define the properties of this container<a name="line.100"></a>
<span class="sourceLineNo">101</span>     * and how to extract them.<a name="line.101"></a>
<span class="sourceLineNo">102</span>     * &lt;/p&gt;<a name="line.102"></a>
<span class="sourceLineNo">103</span>     */<a name="line.103"></a>
<span class="sourceLineNo">104</span>    protected AbstractQueryContainer() {<a name="line.104"></a>
<span class="sourceLineNo">105</span>        this((PropertyExtractor&lt;T&gt;)null);<a name="line.105"></a>
<span class="sourceLineNo">106</span>    }<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span>    /**<a name="line.108"></a>
<span class="sourceLineNo">109</span>     * Constructor.<a name="line.109"></a>
<span class="sourceLineNo">110</span>     *<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * &lt;p&gt;<a name="line.111"></a>
<span class="sourceLineNo">112</span>     * After using this constructor, a subsequent invocation of {@link #setProperties setProperties()} is required<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * to define the properties of this container.<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * &lt;/p&gt;<a name="line.114"></a>
<span class="sourceLineNo">115</span>     *<a name="line.115"></a>
<span class="sourceLineNo">116</span>     * @param propertyExtractor used to extract properties from the underlying Java objects;<a name="line.116"></a>
<span class="sourceLineNo">117</span>     *  may be null but then container is not usable until one is configured via<a name="line.117"></a>
<span class="sourceLineNo">118</span>     * {@link #setPropertyExtractor setPropertyExtractor()}<a name="line.118"></a>
<span class="sourceLineNo">119</span>     */<a name="line.119"></a>
<span class="sourceLineNo">120</span>    protected AbstractQueryContainer(PropertyExtractor&lt;? super T&gt; propertyExtractor) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>        this(propertyExtractor, null);<a name="line.121"></a>
<span class="sourceLineNo">122</span>    }<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span>    /**<a name="line.124"></a>
<span class="sourceLineNo">125</span>     * Constructor.<a name="line.125"></a>
<span class="sourceLineNo">126</span>     *<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * &lt;p&gt;<a name="line.127"></a>
<span class="sourceLineNo">128</span>     * After using this constructor, a subsequent invocation of {@link #setPropertyExtractor setPropertyExtractor()}<a name="line.128"></a>
<span class="sourceLineNo">129</span>     * is required to define how to extract the properties of this container; alternately, subclasses can override<a name="line.129"></a>
<span class="sourceLineNo">130</span>     * {@link #getPropertyValue getPropertyValue()}.<a name="line.130"></a>
<span class="sourceLineNo">131</span>     * &lt;/p&gt;<a name="line.131"></a>
<span class="sourceLineNo">132</span>     *<a name="line.132"></a>
<span class="sourceLineNo">133</span>     * @param propertyDefs container property definitions; null is treated like the empty set<a name="line.133"></a>
<span class="sourceLineNo">134</span>     */<a name="line.134"></a>
<span class="sourceLineNo">135</span>    protected AbstractQueryContainer(Collection&lt;? extends PropertyDef&lt;?&gt;&gt; propertyDefs) {<a name="line.135"></a>
<span class="sourceLineNo">136</span>        this(null, propertyDefs);<a name="line.136"></a>
<span class="sourceLineNo">137</span>    }<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span>    /**<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * Constructor.<a name="line.140"></a>
<span class="sourceLineNo">141</span>     *<a name="line.141"></a>
<span class="sourceLineNo">142</span>     * @param propertyExtractor used to extract properties from the underlying Java objects;<a name="line.142"></a>
<span class="sourceLineNo">143</span>     *  may be null but then container is not usable until one is configured via<a name="line.143"></a>
<span class="sourceLineNo">144</span>     * {@link #setPropertyExtractor setPropertyExtractor()}<a name="line.144"></a>
<span class="sourceLineNo">145</span>     * @param propertyDefs container property definitions; null is treated like the empty set<a name="line.145"></a>
<span class="sourceLineNo">146</span>     */<a name="line.146"></a>
<span class="sourceLineNo">147</span>    protected AbstractQueryContainer(PropertyExtractor&lt;? super T&gt; propertyExtractor,<a name="line.147"></a>
<span class="sourceLineNo">148</span>      Collection&lt;? extends PropertyDef&lt;?&gt;&gt; propertyDefs) {<a name="line.148"></a>
<span class="sourceLineNo">149</span>        this.setPropertyExtractor(propertyExtractor);<a name="line.149"></a>
<span class="sourceLineNo">150</span>        this.setProperties(propertyDefs);<a name="line.150"></a>
<span class="sourceLineNo">151</span>    }<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span>    /**<a name="line.153"></a>
<span class="sourceLineNo">154</span>     * Constructor.<a name="line.154"></a>
<span class="sourceLineNo">155</span>     *<a name="line.155"></a>
<span class="sourceLineNo">156</span>     * &lt;p&gt;<a name="line.156"></a>
<span class="sourceLineNo">157</span>     * Properties will be determined by the {@link ProvidesProperty &amp;#64;ProvidesProperty} and<a name="line.157"></a>
<span class="sourceLineNo">158</span>     * {@link ProvidesPropertySort &amp;#64;ProvidesPropertySort} annotated methods in the given class.<a name="line.158"></a>
<span class="sourceLineNo">159</span>     * &lt;/p&gt;<a name="line.159"></a>
<span class="sourceLineNo">160</span>     *<a name="line.160"></a>
<span class="sourceLineNo">161</span>     * @param type class to introspect for annotated methods<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * @throws IllegalArgumentException if {@code type} is null<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * @throws IllegalArgumentException if {@code type} has two {@link ProvidesProperty &amp;#64;ProvidesProperty}<a name="line.163"></a>
<span class="sourceLineNo">164</span>     *  or {@link ProvidesPropertySort &amp;#64;ProvidesPropertySort} annotated methods for the same property<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @throws IllegalArgumentException if a {@link ProvidesProperty &amp;#64;ProvidesProperty}-annotated method with no<a name="line.165"></a>
<span class="sourceLineNo">166</span>     *  {@linkplain ProvidesProperty#value property name specified} has a name which cannot be interpreted as a bean<a name="line.166"></a>
<span class="sourceLineNo">167</span>     *  property "getter" method<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * @see ProvidesProperty<a name="line.168"></a>
<span class="sourceLineNo">169</span>     * @see ProvidesPropertySort<a name="line.169"></a>
<span class="sourceLineNo">170</span>     * @see ProvidesPropertyScanner<a name="line.170"></a>
<span class="sourceLineNo">171</span>     */<a name="line.171"></a>
<span class="sourceLineNo">172</span>    @SuppressWarnings({ "unchecked", "rawtypes" })<a name="line.172"></a>
<span class="sourceLineNo">173</span>    protected AbstractQueryContainer(Class&lt;? super T&gt; type) {<a name="line.173"></a>
<span class="sourceLineNo">174</span>        // Why the JLS forces this stupid cast:<a name="line.174"></a>
<span class="sourceLineNo">175</span>        //  http://stackoverflow.com/questions/4902723/why-cant-a-java-type-parameter-have-a-lower-bound<a name="line.175"></a>
<span class="sourceLineNo">176</span>        final ProvidesPropertyScanner&lt;? super T&gt; propertyReader<a name="line.176"></a>
<span class="sourceLineNo">177</span>          = (ProvidesPropertyScanner&lt;? super T&gt;)new ProvidesPropertyScanner(type);<a name="line.177"></a>
<span class="sourceLineNo">178</span>        this.setPropertyExtractor(propertyReader.getPropertyExtractor());<a name="line.178"></a>
<span class="sourceLineNo">179</span>        this.setProperties(propertyReader.getPropertyDefs());<a name="line.179"></a>
<span class="sourceLineNo">180</span>    }<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span>// Public methods<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>    /**<a name="line.184"></a>
<span class="sourceLineNo">185</span>     * Get the configured {@link PropertyExtractor} for this container.<a name="line.185"></a>
<span class="sourceLineNo">186</span>     */<a name="line.186"></a>
<span class="sourceLineNo">187</span>    public PropertyExtractor&lt;? super T&gt; getPropertyExtractor() {<a name="line.187"></a>
<span class="sourceLineNo">188</span>        return this.propertyExtractor;<a name="line.188"></a>
<span class="sourceLineNo">189</span>    }<a name="line.189"></a>
<span class="sourceLineNo">190</span><a name="line.190"></a>
<span class="sourceLineNo">191</span>    /**<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * Change the configured {@link PropertyExtractor} for this container.<a name="line.192"></a>
<span class="sourceLineNo">193</span>     * Invoking this method does not result in any container notifications.<a name="line.193"></a>
<span class="sourceLineNo">194</span>     *<a name="line.194"></a>
<span class="sourceLineNo">195</span>     * @param propertyExtractor used to extract properties from the underlying Java objects;<a name="line.195"></a>
<span class="sourceLineNo">196</span>     *  may be null but the container is not usable without one<a name="line.196"></a>
<span class="sourceLineNo">197</span>     */<a name="line.197"></a>
<span class="sourceLineNo">198</span>    public void setPropertyExtractor(PropertyExtractor&lt;? super T&gt; propertyExtractor) {<a name="line.198"></a>
<span class="sourceLineNo">199</span>        this.propertyExtractor = propertyExtractor;<a name="line.199"></a>
<span class="sourceLineNo">200</span>    }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span>    /**<a name="line.202"></a>
<span class="sourceLineNo">203</span>     * Read the value of the property defined by {@code propertyDef} from the given object.<a name="line.203"></a>
<span class="sourceLineNo">204</span>     *<a name="line.204"></a>
<span class="sourceLineNo">205</span>     * &lt;p&gt;<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * The implementation in {@link AbstractQueryContainer} just delegates to the {@linkplain #setPropertyExtractor configured}<a name="line.206"></a>
<span class="sourceLineNo">207</span>     * {@link PropertyExtractor}; subclasses may override to customize property extraction.<a name="line.207"></a>
<span class="sourceLineNo">208</span>     * &lt;/p&gt;<a name="line.208"></a>
<span class="sourceLineNo">209</span>     *<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * @param obj Java object<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * @param propertyDef definition of which property to read<a name="line.211"></a>
<span class="sourceLineNo">212</span>     * @throws NullPointerException if either parameter is null<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * @throws IllegalStateException if no {@link PropertyExtractor} is configured for this container<a name="line.213"></a>
<span class="sourceLineNo">214</span>     */<a name="line.214"></a>
<span class="sourceLineNo">215</span>    @Override<a name="line.215"></a>
<span class="sourceLineNo">216</span>    public &lt;V&gt; V getPropertyValue(T obj, PropertyDef&lt;V&gt; propertyDef) {<a name="line.216"></a>
<span class="sourceLineNo">217</span>        if (this.propertyExtractor == null)<a name="line.217"></a>
<span class="sourceLineNo">218</span>            throw new IllegalStateException("no PropertyExtractor is configured for this container");<a name="line.218"></a>
<span class="sourceLineNo">219</span>        return this.propertyExtractor.getPropertyValue(obj, propertyDef);<a name="line.219"></a>
<span class="sourceLineNo">220</span>    }<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span>    /**<a name="line.222"></a>
<span class="sourceLineNo">223</span>     * Change the configured properties of this container.<a name="line.223"></a>
<span class="sourceLineNo">224</span>     *<a name="line.224"></a>
<span class="sourceLineNo">225</span>     * @param propertyDefs container property definitions; null is treated like the empty set<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * @throws IllegalArgumentException if {@code propertyDefs} contains a property with a duplicate name<a name="line.226"></a>
<span class="sourceLineNo">227</span>     */<a name="line.227"></a>
<span class="sourceLineNo">228</span>    public void setProperties(Collection&lt;? extends PropertyDef&lt;?&gt;&gt; propertyDefs) {<a name="line.228"></a>
<span class="sourceLineNo">229</span>        if (propertyDefs == null)<a name="line.229"></a>
<span class="sourceLineNo">230</span>            propertyDefs = Collections.&lt;PropertyDef&lt;?&gt;&gt;emptySet();<a name="line.230"></a>
<span class="sourceLineNo">231</span>        this.propertyMap.clear();<a name="line.231"></a>
<span class="sourceLineNo">232</span>        for (PropertyDef&lt;?&gt; propertyDef : propertyDefs) {<a name="line.232"></a>
<span class="sourceLineNo">233</span>            if (this.propertyMap.put(propertyDef.getName(), propertyDef) != null)<a name="line.233"></a>
<span class="sourceLineNo">234</span>                throw new IllegalArgumentException("duplicate property name `" + propertyDef.getName() + "'");<a name="line.234"></a>
<span class="sourceLineNo">235</span>        }<a name="line.235"></a>
<span class="sourceLineNo">236</span>        this.fireContainerPropertySetChange();<a name="line.236"></a>
<span class="sourceLineNo">237</span>    }<a name="line.237"></a>
<span class="sourceLineNo">238</span><a name="line.238"></a>
<span class="sourceLineNo">239</span>    /**<a name="line.239"></a>
<span class="sourceLineNo">240</span>     * Reload this container.<a name="line.240"></a>
<span class="sourceLineNo">241</span>     *<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * &lt;p&gt;<a name="line.242"></a>
<span class="sourceLineNo">243</span>     * This discards the current cached {@link QueryList} (if any) and fires an item set change event.<a name="line.243"></a>
<span class="sourceLineNo">244</span>     */<a name="line.244"></a>
<span class="sourceLineNo">245</span>    public void reload() {<a name="line.245"></a>
<span class="sourceLineNo">246</span>        this.invalidate();<a name="line.246"></a>
<span class="sourceLineNo">247</span>        this.fireItemSetChange();<a name="line.247"></a>
<span class="sourceLineNo">248</span>    }<a name="line.248"></a>
<span class="sourceLineNo">249</span><a name="line.249"></a>
<span class="sourceLineNo">250</span>// Subclass hooks and methods<a name="line.250"></a>
<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span>    /**<a name="line.252"></a>
<span class="sourceLineNo">253</span>     * Perform a query to (re)generate the list of Java objects backing this container.<a name="line.253"></a>
<span class="sourceLineNo">254</span>     *<a name="line.254"></a>
<span class="sourceLineNo">255</span>     * &lt;p&gt;<a name="line.255"></a>
<span class="sourceLineNo">256</span>     * The particular position in the list we are interested in is given as a hint by the {@code hint} parameter.<a name="line.256"></a>
<span class="sourceLineNo">257</span>     * That is, an invocation of {@link QueryList#get}{@code (hint)} is likely immediately after this method<a name="line.257"></a>
<span class="sourceLineNo">258</span>     * returns and if so it must complete without throwing an exception, unless {@code hint} is out of range.<a name="line.258"></a>
<span class="sourceLineNo">259</span>     * &lt;/p&gt;<a name="line.259"></a>
<span class="sourceLineNo">260</span>     *<a name="line.260"></a>
<span class="sourceLineNo">261</span>     * &lt;p&gt;<a name="line.261"></a>
<span class="sourceLineNo">262</span>     * The {@code hint} can be used to implement a highly scalable query list containing external objects<a name="line.262"></a>
<span class="sourceLineNo">263</span>     * (such as from a database) where only a small "window" of objects is actually kept in memory at any one time.<a name="line.263"></a>
<span class="sourceLineNo">264</span>     * Of course, implementations are also free to ignore {@code hint}. However, the returned {@link QueryList}<a name="line.264"></a>
<span class="sourceLineNo">265</span>     * must at least tolerate one invocation of {@link QueryList#get get}{@code (hint)} without throwing an exception<a name="line.265"></a>
<span class="sourceLineNo">266</span>     * when {@code hint} is less that the {@link QueryList#size size()} of the returned {@link QueryList}.<a name="line.266"></a>
<span class="sourceLineNo">267</span>     * &lt;/p&gt;<a name="line.267"></a>
<span class="sourceLineNo">268</span>     *<a name="line.268"></a>
<span class="sourceLineNo">269</span>     * @param hint index of the list element we are interested in<a name="line.269"></a>
<span class="sourceLineNo">270</span>     * @return list of Java objects backing this container<a name="line.270"></a>
<span class="sourceLineNo">271</span>     */<a name="line.271"></a>
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<span class="sourceLineNo">273</span><a name="line.273"></a>
<span class="sourceLineNo">274</span>    /**<a name="line.274"></a>
<span class="sourceLineNo">275</span>     * Discard the current cached {@link QueryList}, if any.<a name="line.275"></a>
<span class="sourceLineNo">276</span>     */<a name="line.276"></a>
<span class="sourceLineNo">277</span>    protected void invalidate() {<a name="line.277"></a>
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<span class="sourceLineNo">280</span><a name="line.280"></a>
<span class="sourceLineNo">281</span>    /**<a name="line.281"></a>
<span class="sourceLineNo">282</span>     * Get the Java backing object at the given index in the list.<a name="line.282"></a>
<span class="sourceLineNo">283</span>     *<a name="line.283"></a>
<span class="sourceLineNo">284</span>     * @return backing object, or null if {@code index} is out of range<a name="line.284"></a>
<span class="sourceLineNo">285</span>     */<a name="line.285"></a>
<span class="sourceLineNo">286</span>    protected T getJavaObject(int index) {<a name="line.286"></a>
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<span class="sourceLineNo">288</span>        long currentSize;<a name="line.288"></a>
<span class="sourceLineNo">289</span>        int attempt = 1;<a name="line.289"></a>
<span class="sourceLineNo">290</span>        while (true) {<a name="line.290"></a>
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<span class="sourceLineNo">293</span>                return null;<a name="line.293"></a>
<span class="sourceLineNo">294</span>            try {<a name="line.294"></a>
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<span class="sourceLineNo">296</span>            } catch (InvalidQueryListException e) {<a name="line.296"></a>
<span class="sourceLineNo">297</span>                this.invalidate();<a name="line.297"></a>
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<span class="sourceLineNo">302</span>            } catch (IndexOutOfBoundsException e) {<a name="line.302"></a>
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<span class="sourceLineNo">304</span>                break;<a name="line.304"></a>
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<span class="sourceLineNo">307</span>        }<a name="line.307"></a>
<span class="sourceLineNo">308</span><a name="line.308"></a>
<span class="sourceLineNo">309</span>        // The QueryList is behaving badly<a name="line.309"></a>
<span class="sourceLineNo">310</span>        throw new RuntimeException("query(" + index + ") returned a QueryList with size() = "<a name="line.310"></a>
<span class="sourceLineNo">311</span>          + currentSize + " but QueryList.get(" + index + ") failed (attempt #" + attempt + ")", exception);<a name="line.311"></a>
<span class="sourceLineNo">312</span>    }<a name="line.312"></a>
<span class="sourceLineNo">313</span><a name="line.313"></a>
<span class="sourceLineNo">314</span>    /**<a name="line.314"></a>
<span class="sourceLineNo">315</span>     * Ensure we have a cached query list.<a name="line.315"></a>
<span class="sourceLineNo">316</span>     *<a name="line.316"></a>
<span class="sourceLineNo">317</span>     * @param hint index of the list element we are interested in, passed to {@link #query} if no query list is cached<a name="line.317"></a>
<span class="sourceLineNo">318</span>     * @return the size of the cached query list<a name="line.318"></a>
<span class="sourceLineNo">319</span>     */<a name="line.319"></a>
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<span class="sourceLineNo">324</span>            final long newTotalSize = this.queryList.size();<a name="line.324"></a>
<span class="sourceLineNo">325</span>            this.totalSize = newTotalSize;<a name="line.325"></a>
<span class="sourceLineNo">326</span>            if (oldTotalSize != -1 &amp;&amp; newTotalSize != oldTotalSize)<a name="line.326"></a>
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<span class="sourceLineNo">328</span>        }<a name="line.328"></a>
<span class="sourceLineNo">329</span>        return this.totalSize;<a name="line.329"></a>
<span class="sourceLineNo">330</span>    }<a name="line.330"></a>
<span class="sourceLineNo">331</span><a name="line.331"></a>
<span class="sourceLineNo">332</span>    /**<a name="line.332"></a>
<span class="sourceLineNo">333</span>     * Invoked when a new {@link QueryList} has returned a changed {@link QueryList#size size()}<a name="line.333"></a>
<span class="sourceLineNo">334</span>     * for the underlying list.<a name="line.334"></a>
<span class="sourceLineNo">335</span>     *<a name="line.335"></a>
<span class="sourceLineNo">336</span>     * &lt;p&gt;<a name="line.336"></a>
<span class="sourceLineNo">337</span>     * Normally, this implies an item set change notification will be generated elsewhere and so<a name="line.337"></a>
<span class="sourceLineNo">338</span>     * no additional action needs to be taken by this method. However, some implementations may<a name="line.338"></a>
<span class="sourceLineNo">339</span>     * lack such a mechanism, for example, when the container's size is only ever calculated when<a name="line.339"></a>
<span class="sourceLineNo">340</span>     * {@link #query} is invoked. In such cases, this method may trigger a notification.<a name="line.340"></a>
<span class="sourceLineNo">341</span>     * &lt;/p&gt;<a name="line.341"></a>
<span class="sourceLineNo">342</span>     *<a name="line.342"></a>
<span class="sourceLineNo">343</span>     * &lt;p&gt;<a name="line.343"></a>
<span class="sourceLineNo">344</span>     * Note: to avoid re-entrancy problems, this method should not send out any notifications itself;<a name="line.344"></a>
<span class="sourceLineNo">345</span>     * instead, it should schedule notifications to be delivered later.<a name="line.345"></a>
<span class="sourceLineNo">346</span>     * &lt;/p&gt;<a name="line.346"></a>
<span class="sourceLineNo">347</span>     *<a name="line.347"></a>
<span class="sourceLineNo">348</span>     * &lt;p&gt;<a name="line.348"></a>
<span class="sourceLineNo">349</span>     * The implementation in {@link AbstractQueryContainer} does nothing, assuming the notification is handled<a name="line.349"></a>
<span class="sourceLineNo">350</span>     * elsewhere. Subclasses may override if needed.<a name="line.350"></a>
<span class="sourceLineNo">351</span>     * &lt;/p&gt;<a name="line.351"></a>
<span class="sourceLineNo">352</span>     */<a name="line.352"></a>
<span class="sourceLineNo">353</span>    protected void handleSizeChange() {<a name="line.353"></a>
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<span class="sourceLineNo">355</span><a name="line.355"></a>
<span class="sourceLineNo">356</span>// Container<a name="line.356"></a>
<span class="sourceLineNo">357</span><a name="line.357"></a>
<span class="sourceLineNo">358</span>    @Override<a name="line.358"></a>
<span class="sourceLineNo">359</span>    public SimpleItem&lt;T&gt; getItem(Object itemId) {<a name="line.359"></a>
<span class="sourceLineNo">360</span>        if (!(itemId instanceof Integer))<a name="line.360"></a>
<span class="sourceLineNo">361</span>            return null;<a name="line.361"></a>
<span class="sourceLineNo">362</span>        int index = ((Integer)itemId).intValue();<a name="line.362"></a>
<span class="sourceLineNo">363</span>        T obj = this.getJavaObject(index);<a name="line.363"></a>
<span class="sourceLineNo">364</span>        if (obj == null)<a name="line.364"></a>
<span class="sourceLineNo">365</span>            return null;<a name="line.365"></a>
<span class="sourceLineNo">366</span>        return new SimpleItem&lt;T&gt;(obj, this.propertyMap, this);<a name="line.366"></a>
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<span class="sourceLineNo">368</span><a name="line.368"></a>
<span class="sourceLineNo">369</span>    @Override<a name="line.369"></a>
<span class="sourceLineNo">370</span>    public Collection&lt;Integer&gt; getItemIds() {<a name="line.370"></a>
<span class="sourceLineNo">371</span>        return new IntList(this.size());<a name="line.371"></a>
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<span class="sourceLineNo">373</span><a name="line.373"></a>
<span class="sourceLineNo">374</span>    @Override<a name="line.374"></a>
<span class="sourceLineNo">375</span>    public Set&lt;String&gt; getContainerPropertyIds() {<a name="line.375"></a>
<span class="sourceLineNo">376</span>        return Collections.unmodifiableSet(this.propertyMap.keySet());<a name="line.376"></a>
<span class="sourceLineNo">377</span>    }<a name="line.377"></a>
<span class="sourceLineNo">378</span><a name="line.378"></a>
<span class="sourceLineNo">379</span>    @Override<a name="line.379"></a>
<span class="sourceLineNo">380</span>    public Property getContainerProperty(Object itemId, Object propertyId) {<a name="line.380"></a>
<span class="sourceLineNo">381</span>        SimpleItem&lt;T&gt; item = this.getItem(itemId);<a name="line.381"></a>
<span class="sourceLineNo">382</span>        return item != null ? item.getItemProperty(propertyId) : null;<a name="line.382"></a>
<span class="sourceLineNo">383</span>    }<a name="line.383"></a>
<span class="sourceLineNo">384</span><a name="line.384"></a>
<span class="sourceLineNo">385</span>    @Override<a name="line.385"></a>
<span class="sourceLineNo">386</span>    public Class&lt;?&gt; getType(Object propertyId) {<a name="line.386"></a>
<span class="sourceLineNo">387</span>        PropertyDef&lt;?&gt; propertyDef = this.propertyMap.get(propertyId);<a name="line.387"></a>
<span class="sourceLineNo">388</span>        return propertyDef != null ? propertyDef.getType() : null;<a name="line.388"></a>
<span class="sourceLineNo">389</span>    }<a name="line.389"></a>
<span class="sourceLineNo">390</span><a name="line.390"></a>
<span class="sourceLineNo">391</span>    @Override<a name="line.391"></a>
<span class="sourceLineNo">392</span>    public int size() {<a name="line.392"></a>
<span class="sourceLineNo">393</span>        return (int)this.ensureList(0);<a name="line.393"></a>
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<span class="sourceLineNo">395</span><a name="line.395"></a>
<span class="sourceLineNo">396</span>    @Override<a name="line.396"></a>
<span class="sourceLineNo">397</span>    public boolean containsId(Object itemId) {<a name="line.397"></a>
<span class="sourceLineNo">398</span>        if (!(itemId instanceof Integer))<a name="line.398"></a>
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<span class="sourceLineNo">403</span><a name="line.403"></a>
<span class="sourceLineNo">404</span>    /**<a name="line.404"></a>
<span class="sourceLineNo">405</span>     * @throws UnsupportedOperationException always<a name="line.405"></a>
<span class="sourceLineNo">406</span>     */<a name="line.406"></a>
<span class="sourceLineNo">407</span>    @Override<a name="line.407"></a>
<span class="sourceLineNo">408</span>    public Item addItem(Object itemId) {<a name="line.408"></a>
<span class="sourceLineNo">409</span>        throw new UnsupportedOperationException();<a name="line.409"></a>
<span class="sourceLineNo">410</span>    }<a name="line.410"></a>
<span class="sourceLineNo">411</span><a name="line.411"></a>
<span class="sourceLineNo">412</span>    /**<a name="line.412"></a>
<span class="sourceLineNo">413</span>     * @throws UnsupportedOperationException always<a name="line.413"></a>
<span class="sourceLineNo">414</span>     */<a name="line.414"></a>
<span class="sourceLineNo">415</span>    @Override<a name="line.415"></a>
<span class="sourceLineNo">416</span>    public Item addItem() {<a name="line.416"></a>
<span class="sourceLineNo">417</span>        throw new UnsupportedOperationException();<a name="line.417"></a>
<span class="sourceLineNo">418</span>    }<a name="line.418"></a>
<span class="sourceLineNo">419</span><a name="line.419"></a>
<span class="sourceLineNo">420</span>    /**<a name="line.420"></a>
<span class="sourceLineNo">421</span>     * @throws UnsupportedOperationException always<a name="line.421"></a>
<span class="sourceLineNo">422</span>     */<a name="line.422"></a>
<span class="sourceLineNo">423</span>    @Override<a name="line.423"></a>
<span class="sourceLineNo">424</span>    public boolean removeItem(Object itemId) {<a name="line.424"></a>
<span class="sourceLineNo">425</span>        throw new UnsupportedOperationException();<a name="line.425"></a>
<span class="sourceLineNo">426</span>    }<a name="line.426"></a>
<span class="sourceLineNo">427</span><a name="line.427"></a>
<span class="sourceLineNo">428</span>    /**<a name="line.428"></a>
<span class="sourceLineNo">429</span>     * @throws UnsupportedOperationException always<a name="line.429"></a>
<span class="sourceLineNo">430</span>     */<a name="line.430"></a>
<span class="sourceLineNo">431</span>    @Override<a name="line.431"></a>
<span class="sourceLineNo">432</span>    public boolean addContainerProperty(Object propertyId, Class&lt;?&gt; type, Object defaultValue) {<a name="line.432"></a>
<span class="sourceLineNo">433</span>        throw new UnsupportedOperationException();<a name="line.433"></a>
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<span class="sourceLineNo">435</span><a name="line.435"></a>
<span class="sourceLineNo">436</span>    /**<a name="line.436"></a>
<span class="sourceLineNo">437</span>     * @throws UnsupportedOperationException always<a name="line.437"></a>
<span class="sourceLineNo">438</span>     */<a name="line.438"></a>
<span class="sourceLineNo">439</span>    @Override<a name="line.439"></a>
<span class="sourceLineNo">440</span>    public boolean removeContainerProperty(Object propertyId) {<a name="line.440"></a>
<span class="sourceLineNo">441</span>        throw new UnsupportedOperationException();<a name="line.441"></a>
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<span class="sourceLineNo">443</span><a name="line.443"></a>
<span class="sourceLineNo">444</span>    /**<a name="line.444"></a>
<span class="sourceLineNo">445</span>     * @throws UnsupportedOperationException always<a name="line.445"></a>
<span class="sourceLineNo">446</span>     */<a name="line.446"></a>
<span class="sourceLineNo">447</span>    @Override<a name="line.447"></a>
<span class="sourceLineNo">448</span>    public boolean removeAllItems() {<a name="line.448"></a>
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<span class="sourceLineNo">451</span><a name="line.451"></a>
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<span class="sourceLineNo">453</span><a name="line.453"></a>
<span class="sourceLineNo">454</span>    /**<a name="line.454"></a>
<span class="sourceLineNo">455</span>     * @throws UnsupportedOperationException always<a name="line.455"></a>
<span class="sourceLineNo">456</span>     */<a name="line.456"></a>
<span class="sourceLineNo">457</span>    @Override<a name="line.457"></a>
<span class="sourceLineNo">458</span>    public Object addItemAt(int index) {<a name="line.458"></a>
<span class="sourceLineNo">459</span>        throw new UnsupportedOperationException();<a name="line.459"></a>
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<span class="sourceLineNo">461</span><a name="line.461"></a>
<span class="sourceLineNo">462</span>    /**<a name="line.462"></a>
<span class="sourceLineNo">463</span>     * @throws UnsupportedOperationException always<a name="line.463"></a>
<span class="sourceLineNo">464</span>     */<a name="line.464"></a>
<span class="sourceLineNo">465</span>    @Override<a name="line.465"></a>
<span class="sourceLineNo">466</span>    public Item addItemAt(int index, Object newItemId) {<a name="line.466"></a>
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<span class="sourceLineNo">469</span><a name="line.469"></a>
<span class="sourceLineNo">470</span>    @Override<a name="line.470"></a>
<span class="sourceLineNo">471</span>    public Integer getIdByIndex(int index) {<a name="line.471"></a>
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<span class="sourceLineNo">479</span><a name="line.479"></a>
<span class="sourceLineNo">480</span>    //@Override in Vaadin 7<a name="line.480"></a>
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<span class="sourceLineNo">598</span>        private final int size;<a name="line.598"></a>
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<span class="sourceLineNo">603</span><a name="line.603"></a>
<span class="sourceLineNo">604</span>        public IntList(int min, int size) {<a name="line.604"></a>
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<span class="sourceLineNo">610</span><a name="line.610"></a>
<span class="sourceLineNo">611</span>        @Override<a name="line.611"></a>
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<span class="sourceLineNo">615</span><a name="line.615"></a>
<span class="sourceLineNo">616</span>        @Override<a name="line.616"></a>
<span class="sourceLineNo">617</span>        public Integer get(int index) {<a name="line.617"></a>
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<span class="sourceLineNo">620</span>            return this.min + index;<a name="line.620"></a>
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<span class="sourceLineNo">622</span>    }<a name="line.622"></a>
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<span class="sourceLineNo">624</span><a name="line.624"></a>




























































</pre>
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